Sony A7r II

Very important, if your considering using Canon Wide Angle with an adapter, read this article first:
Article on using the Metabonse adapter here Canon wide angle lenses are having issues with edge softness when using an adapter.

It offers full EF lens support for Canon users with Metabonse adapter,
including AF and continuous tracking and aperture control. Supposedly
it has a fast phase detection AF system, but I will wait to hear what
the early testers have to say.

"This is
potentially a huge deal – especially for Canon users. We’ve used an a7R
II with a Canon 24-70mm lens
and a Metabones adapter, and focus is very fast indeed. We’ll be
looking at this in more depth as soon as we have a production sample
camera, but for now, we’re highly impressed"

If
this works as well as I am hearing with EF lenses, I may try this
camera out, I don't like the Sony interface and I don't like Sony's
support or trust that they will stay the course, but the Sony sensors
are very clean and I may have to get on board with this one, I will keep
my 5D Mk III, because the A7 is still no DSLR and some times I need
that kind of speed